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Spinning and Post-processing of Carbon Nanotube Fibers and Their Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Porous Materials".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 6147

Special Issue Editor


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Guest Editor
Department of Organic Material Science and Engineering, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
Interests: carbon nanotubes; fibers; chemical engineering; data-driven engineering
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Special Issue Information

Dear Colleagues,

It is my pleasure to invite you to this Special Issue on Spinning and Post-Processing of Carbon Nanotube Fibers and Their Applications. A carbon nanotube fiber (CNTF), also known as a CNT yarn, is one dimensional macroscopic assembly of CNTs. This macroscopic structure opened new applications exploiting the excellent properties of individual CNTs.

During the last two decades, there have been splendid progresses in the research of CNTFs. Three representative techniques to spin CNTFs were developed in the early 21st century and have been improved competitively. In addition, various post-processing techniques have also been developed to further improve the properties of CNTFs. As a result, the state-of-the-art CNTFs possess mechanical properties comparable to that of commercial carbon fibers. The electrical conductivity and flexibility of CNTFs even outperform carbon fibers, making them versatile in various applications. Accordingly, using the excellent properties of CNTFs, various applications have been successfully demonstrated.

It has been 20 years since CNTFs was first reported. It is very timely to bring together recent progresses in the research on CNTFs. The special issue will comprehensively cover topics related CNTFs.

The topics of interest include, but are not limited to:

  • Spinning techniques of carbon nanotube fibers
  • Post-processing of carbon nanotube fibers
  • Properties of carbon nanotube fibers
  • Characterization of carbon nanotube fibers
  • Application of carbon nanotube fibers
  • Synthesis of carbon nanotubes for fiber applications
  • Other macroscopic assemblies of carbon nanotubes

Prof. Dr. Jaegeun Lee
Guest Editor

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Keywords

  • carbon nanotube
  • fiber
  • yarn
  • spinning
  • post-processing
  • applications
  • mechanical properties
  • electrical conductivity
  • nanocarbon

Published Papers (3 papers)

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Research

10 pages, 1736 KiB  
Article
Analysis of Dispersion of Carbon Nanotubes in m-Cresol
by Jaegyun Im, Dong-Myeong Lee and Jaegeun Lee
Materials 2022, 15(11), 3777; https://doi.org/10.3390/ma15113777 - 25 May 2022
Viewed by 2264
Abstract
We analyzed the dispersion state of carbon nanotubes (CNTs) in m-cresol using dispersion stability analysis, optical microscopy, and UV-vis spectroscopy. The high dispersion stability of CNT/m-cresol dispersion was observed when it was sufficiently treated with ultrasonication. Despite the high dispersion [...] Read more.
We analyzed the dispersion state of carbon nanotubes (CNTs) in m-cresol using dispersion stability analysis, optical microscopy, and UV-vis spectroscopy. The high dispersion stability of CNT/m-cresol dispersion was observed when it was sufficiently treated with ultrasonication. Despite the high dispersion stability, optical microscopy and UV-vis spectroscopy analysis of various CNT/m-cresol dispersions revealed that CNT bundles in m-cresol were not dispersed into individual CNTs. We also propose that the blue-shift of the G peak of CNTs in m-cresol in the Raman spectrum, which had been reported as evidence of the formation of the charge-transfer complex between m-cresol and CNTs, is rather attributed to the interference of m-cresol’s inherent peak at around 1600 cm−1. Full article
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11 pages, 4867 KiB  
Article
Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries
by Nayoung Ku, Jaeyeong Cheon, Kyunbae Lee, Yeonsu Jung, Seog-Young Yoon and Taehoon Kim
Materials 2021, 14(24), 7822; https://doi.org/10.3390/ma14247822 - 17 Dec 2021
Cited by 6 | Viewed by 2592
Abstract
Carbon nanotube fiber (CNTF) is a highly conductive and porous platform to grow active materials of lithium-ion batteries (LIB). Here, we prepared SnO2@CNTF based on sulfonic acid-functionalized CNTF to be used in LIB anodes without binder, conductive agent, and current collector. [...] Read more.
Carbon nanotube fiber (CNTF) is a highly conductive and porous platform to grow active materials of lithium-ion batteries (LIB). Here, we prepared SnO2@CNTF based on sulfonic acid-functionalized CNTF to be used in LIB anodes without binder, conductive agent, and current collector. The SnO2 nanoparticles were grown on the CNTF in an aqueous system without a hydrothermal method. The functionalized CNTF exhibited higher conductivity and effective water infiltration compared to the raw CNTF. Due to the enhanced water infiltration, the functionalized CNTF became SnO2@CNTF with an ideal core–shell structure coated with a thin SnO2 layer. The specific capacity and rate capability of SnO2@-functionalized CNTF were superior to those of SnO2@raw CNTF. Since the SnO2@CNTF-based anode was free of a binder, conductive agent, and current collector, the specific capacity of the anode studied in this work was higher than that of conventional anodes. Full article
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8 pages, 3676 KiB  
Article
Mechanical Properties and Epoxy Resin Infiltration Behavior of Carbon-Nanotube-Fiber-Based Single-Fiber Composites
by Jongseon Shin, Kyunbae Lee, Yeonsu Jung, Byeongjin Park, Seung Jae Yang, Taehoon Kim and Sang Bok Lee
Materials 2021, 14(1), 106; https://doi.org/10.3390/ma14010106 - 29 Dec 2020
Cited by 12 | Viewed by 2610
Abstract
Carbon nanotube fiber (CNTF), prepared by the direct-spinning method, has several nanopores, and the infiltration behavior of resins into these nanopores could influence the mechanical properties of CNTF-based composites. In this work, we investigated the infiltration behavior of resin into the nanopores of [...] Read more.
Carbon nanotube fiber (CNTF), prepared by the direct-spinning method, has several nanopores, and the infiltration behavior of resins into these nanopores could influence the mechanical properties of CNTF-based composites. In this work, we investigated the infiltration behavior of resin into the nanopores of the CNTFs and mechanical properties of the CNTF-based single-fiber composites using six epoxy resins with varying viscosities. Epoxy resins can be easily infiltrated into the nanopores of the CNTF; however, pores appear when a resin with significantly high or low viscosity is used in the preparation process of the composites. All the composite fibers exhibit lower load-at-break value compared to as-densified CNTF, which is an unexpected phenomenon. It is speculated that the bundle structure of the CNTF can undergo changes due to the high affinity between the epoxy and CNTF. As composite fibers containing pores exhibit an even lower load-at-break value, the removal of pores by the defoaming process is essential to enhance the mechanical properties of the composite fibers. Full article
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